A modular computer program for subject access to multiple fixed-vocabulary bibliographic data bases has been developed. It is written in PL/I and Assembler Language for operation on the IBM 360 Model 91 computer at the University of California, Los Angeles, and can run on a computer as small as an IBM 360 Model 50. The program (MULFSCH) described represents an intermediate stage in software development for the Center for Information Services (CIS). As such, its principal value to the CIS project is in development of the various procedures (acquisition, cataloging, retrieval, etc.) attendant to the operation of the CIS. (Related documents are available as LI 003296 through LI 003301). (Author)